<?php

require_once __DIR__ . '/lib/SendMail.php';
require_once __DIR__ . '/lib/Session.php';
require_once __DIR__ . '/lib/Helper.php';

$session = new Session();

$lang = 'de';
if (isset($_POST['lang']) && in_array($_POST['lang'], ['de', 'en'], true)) {
    $lang = $_POST['lang'];
} elseif ($session->has('lang') && in_array($session->get('lang'), ['de', 'en'], true)) {
    $lang = $session->get('lang');
}
$isEn = ($lang === 'en');

function validate($data) {
    $hasContact = !empty(trim($data['email'] ?? '')) || !empty(trim($data['phone'] ?? ''));
    return !empty(trim($data['name'] ?? '')) && $hasContact && !empty(trim($data['message'] ?? ''));
}

function isBot($data) {
    return !empty($data['company']) || (($data['check'] ?? '') != 'send' && (time() - (int)($data['timestamp'] ?? 0)) <= 5);
}

if($_POST && count($_POST) > 0) {
    if(isBot($_POST)) {
        exit();
    }

    if(!validate($_POST)) {
        $session->set('form', $_POST);
        $session->set('alert-class', 'alert-danger');
        $session->set('alert', $isEn
            ? 'Please fill out all mandatory fields and provide at least an email address or a phone number.'
            : 'Bitte füllen Sie alle Pflichtfelder aus und geben Sie mindestens eine E-Mail-Adresse oder Telefonnummer an.');
    } else {
        $ip = $_SERVER['REMOTE_ADDR'];

        $mail = new SendMail();
        if(!empty(trim($_POST['email'] ?? ''))) {
            $mail->setReplyTo(trim($_POST['email']), trim($_POST['name']));
        }
        $mail->setTo('kontakt@dialyse-berlin.net', 'Kontaktformular');
//        $mail->setTo('dominic.zirpel@web.de', 'Kontaktformular');
        $mail->setSubject('Kontaktformular - Dialyse Homepage');
		$mail->setBody(sprintf("Name: %s %s\nTelefon: %s\nIP: %s\nE-Mail: %s\n-----------------------------\n%s", $_POST['surname'] ?? '', $_POST['name'] ?? '', $_POST['phone'] ?? '', $ip, $_POST['email'] ?? '', $_POST['message'] ?? ''));
        if($mail->send()) {
            $session->remove('form');
            $session->set('alert-class', 'alert-success');
            $session->set('alert', $isEn
                ? 'Your inquiry has been sent successfully.'
                : 'Ihre Anfrage wurde erfolgreich verschickt');
        } else {
            $session->set('form', $_POST);
            $session->set('alert-class', 'alert-danger');
            $session->set('alert', $isEn
                ? 'An error occurred while sending your inquiry!'
                : 'Beim Verschicken Ihrer Anfrage ist ein Fehler aufgetreten!');
        }
    }
}

header('Location: ' . Helper::url('/kontakt-formular.html', $lang));